1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17694944dde6a41f52dc88b554af1b3b6d651ad297f06be3dc6f45d836a2680b. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5fd47a7-8bca-4dce-8d00-c3425094dde0.json and https://artists.proofprofile.net/proofs/artist/c5fd47a7-8bca-4dce-8d00-c3425094dde0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9eb4f7e853457b6d8849db06def37ea0e2fcfbe3aac845b57a667c1b859b83. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01336353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa240795f5aaf02d51ec9fcc84293c1f39cae6f5794d9d1876c31b4ef9aa8bd6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01224420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb687b760bb43f592fbb54dfa8e927db7edf8672d3310de04e5645649fff8e4ec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01224421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75a55f9e5724b6c8230fd2d732a4c1d024d579975e02db0785603b93bb5d524. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01224423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efc1584cbcf6f5822032e8de6e418db8250146c7db24f8470ffe6711dd90cfb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01224426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2926ad7060506697d90a6ffd35b67d3762ba0a2376582b102aba15515999b7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01227660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7ea504a8475bfebb34c6557a3b4ee7de4205298fc44037f69288eee2a6c474. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01227661.
サンタモニカの夜明け - 2021リマスター
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178003dff54db69b9fc80983af31e419805bee4ec1be5842b314cd2de787b97b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01227667.
ハロー・ハロー・ハロー - 2021リマスター
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3004c4cca94f6238a292f628ef667fae45bcce46e182bc44d02cfe70a27341. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01227668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31817a538115960dadcbbc7964dd3f7d9016624860bab8d965bf124f427db88. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01227669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5200387ba2a6b9da3080ffbfad54a803cd1061b1ff734dd7f5b4237d94b7edd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01227670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22af2aa4a5b1c0c634c87be0b4f3fea2deea618df360991a6199ca3fbf8fd83. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPO01227672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b0f533e3c7224a500c2ce6ceadb0045dd940c312941acd9e3f94910a21aa56. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX6EZ2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d682311379161aeb35edc26c5fa912626b4001df8ac942aa3c8031337e85b0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX6EZ2400015.
Lum no Love Song (Reboot) - tofubeats Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a36e5c5211bc94159fca7dd093a63d613e828fb03867d1ad6cc076ab725abd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPPC02111718.
Lum no Love Song (Reboot) / Bambutsuruten